Night time alarm worn on the wrist or ankle that can detect symptoms of hypoglycaemia (low blood sugar) in people with diabetes. Sensors respond to perspiration and body temperature (cold sweats), two common symptoms of low blood sugar. If detected, a built in vibrator operates along with a tone beeper alarm. Persistent vibration from the alarm is sufficient to disturb most users from sleep enabling a blood test and remedial action to be taken, reducing the likelihood of more serious complications. Durable plastic casing with a comfortable, adjustable elastic strap holds the sensors firmly against the skin. Simple to use, with confirmation beeps for button operation, suitable for sight impaired people. By keeping a record of night-time alarms, the data can be used to adjust insulin doses to prevent nocturnal hypoglycaemia. Includes a lithium 3V watch battery, average 6 months battery life. Low battery warning tone and vibrate. Certified in accordance with the medical directive 93/42/EEC.